Geometric constructions: parallel line | Congruence | High school geometry | Khan Academy

We can parallel lines with compass and straightedge by creating a pair of congruent corresponding angles on a transversal.

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[DRMath]

I remembered constructing those in middle school. It was my favorite chapter in the math book.
Happy Teaching ✌️

[A.........Z]

just in two minutes..i already understand what geometric constructions, thank you so much Khan Academy

[sharvaykondawar]

The way you explained this, explain, not tell, is amazing. It’s hard to find such quality content.

[lunaavadoesmusic]

I love Khan academy it's been so helpful for me if you don't know I'm 13 and in grade 7 so this app has been so helpful for me to pass 7th grade

[NochelynEvardo]

I remembered constructing those in middle school. It was my favorite chapter in the math book.
☺

[Luna_Kato]

Wow! thanks for the video, I was really going to not understand my lesson without this video! I think its better than my 1 hour virtual classroom 😅

[BigBossBernie]

Option 2 - assuming your straight edge is indeed a ruler, you couls measure the distance between the assigned point and your initial line, mark two additional points on your line and copy the distance of the orthogonal. Make sure the constructed points align with the originally assigned one, boom.


Option 3 - use a triangular ruler :)

What I like about geometry a lot is how many ways there are to get the same result :)

[lorraine]

I remember learning this in high school and not paying attention and when I looked back up at the projector being all confused about what happened 😂

[gen_jose]

Lmao. Why was I recommended Khan's epic math tutorials??

[MathswithMuneer]

Hi, I am also a math teacher Sal. Can we collaborate??

[Tehcarp]

My drafting instructor would not approve of this as a way to make a very straight line.

[Fortynienq]

Sal why you don't reply to comments

[arinmei]

Am i the only one that was waiting for him to switch colors at one point-

[danbanana]

My math teacher is making us do this 1 through 10 we are in 7th grade 💀

[nikasabour]

Ummm this says high school why are we learning it in 6 grade?!